1 Kings 22:29-33

29And the king of Israel and Jehoshaphat the king of Judah went up to Ramoth-Gilead.

30And the king of Israel said to Jehoshaphat, I will disguise myself, and will enter into the battle; but put thou on thy robes. And the king of Israel disguised himself, and went into the battle.

31And the king of Syria commanded the thirty-two captains of his chariots saying, Fight neither with small nor great, but with the king of Israel only.

32And it came to pass when the captains of the chariots saw Jehoshaphat, that they said, Surely that is the king of Israel; and they turned against him to fight; and Jehoshaphat cried out.

33And it came to pass that when the captains of the chariots perceived that it was not the king of Israel, they turned back from pursuing him.